Copper is a moderately incompatible chalcophile element. Its behavior is strongly controlled by sulfides. The speciation of sulfur is controlled by oxygen fugacity. Therefore, porphyry Cu deposits ...Web
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The Pulang deposit is a large-scale Late Triassic porphyry copper deposit in this region and is located at 28 • 02′19″ N, 99 • 59′23″ E, with an elevation of over 3300 m (Fig. 2c). ...Web
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This report contains a revised descriptive model of porphyry copper deposits (PCDs), the world's largest source (about 60 percent) and resource (about 65 percent) of copper and a major source of …Web
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porphyry copper deposits, such as Bingham and Bajo de la. Alumbrera, sulphide deposition was primarily due to cooling. of metal-rich, saline brines below 400ºC (Ulrich et al., 2001;Web
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Porphyry copper deposit, large body of rock, typically a porphyry of granitic to dioritic composition, that has been fractured on a fine scale and through which chalcopyrite and …Web
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Porphyry copper ore deposits mostly form beneath volcanoes, where magmas derived from a mid- to upper-crustal magma reservoir intrude into the shallower …Web
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Porphyry copper deposits are formed by aqueous fluids exsolved by differentiated, mantle-derived magmas variably mixed with crustal melts. Water is essential to form porphyry Cu mineralization, and this explains why these deposits are found only at convergent margin settings, where subduction has enriched the mantle source of …Web
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Cu/Au atomic ratios of porphyry copper ore deposits form a continuous range from about 5000 to 5,000,000 with a median near 40,000, which separates gold-rich and gold-poor deposits. Gold is found in porphyry copper deposits in solid solution in Cu–Fe and Cu sulfides and as small grains of native gold, usually along boundaries of …Web
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1 Introduction. Empirical evidence for high oxidation state of porphyry-copper-deposit (PCD) generative arc magmas has been noted and discussed for decades (Burnham & Ohmoto, 1980; Hutchinson & Dilles, 2019; Park et al., 2021).These magmas typically record oxygen fugacity (fO 2) values equal or greater than the Ni–NiO fO 2 …Web
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Differences among porphyry copper deposits may in many cases reflect differences in timing and extent of interaction with meteoric water and the deposits' postmineral histories. There is probably more than one tectonic mechanism capable of generating porphyry copper magmas of variable compositions. The sulfur content and …Web
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Porphyry copper mineralization is associated with Laramide age (~80-45 Ma) magmatism and has been estimated to represent ~300 million tonnes of copper metal, making it a globally significant ...Web
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The cumulative probability of forming a large porphyry Cu deposit at any given time in an arc magmatic system (i.e., a single batholith-linked volcanoplutonic complex) is estimated to be ~0.001%, and less than 1/10 of these deposits will be …Web
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In some porphyry copper deposits, the similarity between pre-, syn-and post-mineral intrusions in terms of texture and geochemistry is a known issue. This is also the case at the Gaby porphyry Cu ...Web
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The Yulong porphyry copper deposit (6.5 Mt at 0.46 % Cu) in eastern Tibet was formed in a post-collisional setting. New zircon U–Pb and U–Th/He ages, apatite U–Th/He ages and in-situ zircon Hf isotopic and trace element data for the Yulong ore-bearing adakitic porphyries elucidate the thermal history and petrogenesis of the …Web
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Information on porphyry copper deposits from around the world with grade and tonnage models, a general classification based on geologic setting, mineralogy, with data allowing …Web
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Zhunuo is a porphyry deposit in the western GPCB. It was discovered in 2004 by the No. 2 Geology Survey Team of Tibet, China. Zhunuo contains 2.3 Mt copper metals at an average grade of 0.57% (Sun et al. 2018).Previous studies have reported zircon U-Pb ages, geochemistry of igneous rocks and molybdenite Re-Os ages for the deposit …Web
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Ali Javad porphyry intrusion has shoshonitic nature and shows characteristics of volcanic arc granitoids that it is have been emplaced in a post-collision tectonic setting. Alteration zones at the deposit demonstrated zoning which is comparable with Lowel-Guilbert model proposed for quartz-monzonite type porphyry copper deposits.Web
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Intrusive rock units, which form the permissive tracts for porphyry copper deposits in the Kerman Belt, are clustered; however, the porphyry copper deposits within the permissive tracts generally show random distribution. (4) Predictive prospectivity modeling can be used for exploration targeting of mineralized intrusive bodies in the …Web
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Porphyry Cu deposits in China contain a total resource of ~47 million tonnes (Mt) Cu at average grades ranging mostly from 0.2 to 0.7% Cu (most <0.5% Cu), accounting for 42% of China's Cu reserves.Web
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Much of the world's economic copper resources are hosted in porphyry copper deposits (PCDs), shallow level magmatic intrusions associated mostly with thick (> 45 km) magmatic arcs, such as mature island arcs and continental arcs.However, a well-known, but unresolved paradox, is that arc magmas traversing thick crust, particularly in …Web
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Abstract. Porphyry Cu systems host some of the most widely distributed mineralization types at convergent plate boundaries, including porphyry deposits centered on intrusions; skarn, carbonate-replacement, and sediment-hosted Au deposits in increasingly peripheral locations; and superjacent high- and intermediate-sulfidation …Web
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The transition to new and green technologies is increasing the need for metals 1, 2 such as copper for which demand is forecast to increase by 140–350% from 2010 to 2050 3, 4. Porphyry-type ...Web
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Intrusions Associated with PorphyryCopper Deposits Intrusions associated with, porphyry copper deposits arediverse but generally felsic and differentiated. Those in island arc settingshave primitive strontium isotopic ratios (87Sr/86Sr of 0.702 to 0.705) and, therefore, are derived either from upper mantle material orrecycled oceanic crust.Web
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Porphyry copper deposits are typically very-low grade with between 0.4 and 1% copper. The main mineral is chalcopyrite, which is finely disseminated through the host porphyritic rocks. The only reason these ore bodies are economic is because porphyries are huge, with hundreds of millions of tonnes available in a fairly low-cost mining setting. ...Web
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Porphyry copper–gold deposits are large volume, low-grade disseminations formed by precipitation of copper and gold (plus molybdenum) from fluids of magmatic origin 1.These deposits form at ...Web
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xvi, 287 pages 32 cm Collects 23 technical papers examining the geology of porphyry copper deposits in the southwestern United States and adjoining regions in Mexico, presenting both general summaries of the gross characteristics of these mineral deposits and descriptions of representative samplings of these depositsWeb
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Porphyry copper deposits are found around the world, most commonly in areas with active or ancient volcanism (Fig. 2). The economic viability of porphyry copper deposits is dictated by the economy of scale – they typically are low grade (average 0.44 % copper in 2008), large tonnage (typically hundreds of millions to billions of metric tonnesWeb
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Introduction. More than two thirds of the annual global production of copper (Singer, 2017) comes from 'porphyry copper' deposits – the very large hydrothermal ore deposits that formed inside the cores of volcanic systems that were active in magmatic arcs throughout the Phanerozoic (Henley and Berger, 2013; Henley and Ellis, 1983; Sillitoe, …Web
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The term "porphyry" comes from the word "porphyritic", a textural term used by geologists to describe the mineral pattern within the rocks that commonly occur in copper porphyry deposits. Porphyry …Web
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They formulated the models using a global data set of zircon chemistry, which is used to evaluate the porphyry copper deposits in magma. The authors focused the models on 15 trace elements. They ...Web
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Introduction. Porphyry Cu systems presently contribute ~75% of the world's Cu production and of the known deposits most formed in Phanerozoic arc-related settings 1, 2. The arc-related calc ...Web
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For porphyry copper deposits, the world's primary source of Cu, Mo, and Re, identifying the dynamic processes that control their emplacement in the upper crust can guide future exploration ...Web
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The Escondida porphyry copper deposit, located in northern Chile, was one of the two largest copper producers of the world in the 1990s. The hydrothermal evolution of this deposit is associated with the emplacement of a late Eocene-Oligocene quartz monzonitic to granodioritic intrusive stock complex composed of at least three intrusive …Web
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Porphyry copper deposits are large. They commonly consist of hundreds of millions to billions of tonnes of ore. However, they contain typically only 0.5–1.5% copper and are therefore classified ...Web
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This publication contains a computer file of information on porphyry copper deposits from around the world. It also presents new grade and tonnage models for …Web
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